First look at the trinkets and the first thing that went through my mind: Holy Shit.
Talking about DTR, I think it might be worth it to sim how much dps it will do in 5.4 with so much damage coming from trinkets instead of the weapon. Since the legendary daggers are getting their proc buffed, it might be possible DTR is getting a stealth buff to the proc as well which with these trinkets might result in it being a perfectly staff to use.

Every other role (except tank, maybe) has static increases to their secondary stats. Casters don't have a 39% cd reduction trinket so I assume they get the 84% secondary stat as something unique to them.